8 
BULLETIN 1037, U. S. DEPARTMENT OF AGRICULTURE. 
Ceratostomella. During the extensive culture work of Hedgcock, 
however, extending over a period of four or five years and involving 
Fig. 2. — Mycelium and fruiting bodies of " blue-stain " fun- 
gus : 1, Tangential section of " blue " wood ; 2, cross sec- 
tion of "blue" wood; 3, cross section of pith ray; 4, 
young fruiting body of the " blue-stain " fungus (Cerato- 
stomella pilifera) ; 5, mature fruiting bodies of the "blue- 
stain " fungus ; 6, two fruiting bodies of the " blue-stain " 
fungus ; 7, two spore sacs with spores of the " blue-stain " 
fungus ; 8, spores of the " blue-stain " fungus ; 9, top of 
beak of f raiting body of Ceratostomella pilifera just after 
the discharge of the spore mass. (After Von Schrenk 
(32), pi. 7.) 
a number of species of Ceratostomella from a variety of sources, no 
Graphium stage of this fungus was ever reported. 
